On the one hand, yes, it allows the inventor to impose a royalty. On the other hand, the whole point of a patent is to spread the idea. A patent has to provide

On the one hand, yes, it allows the inventor to impose a royalty. On the other hand, the whole point of a patent is to spread the idea. A patent has to provide enough information to replicate the invention yourself. So now publishers just have to license the patent; before this, they would have had to come up with a system like this themselves.